Having upgraded to an SDRplay RSPduo, here is a typical result from the overall M2 receiver system here at G8GKU, system details may be found below the image.
METEOR M N2
APRIL 13 2019
ORBIT NUMBER 24700
North to South pass, over UK.
137.910 MHz +- Doppler
RECEIVING SYSTEM, from aerial inwards ….
AERIAL, crossed dipole 4 element turnstile, RHCP
PRE-AMPLIFIER, 24 dB gain ca 0.6 dB N.F.
SIGNAL FEED, 12 Meters coax, low loss double screen.
AMPLIFIER POWER, 9v @ 100 mA, bias T to coax
BAND PASS FILTER, 137.5 MHz, double tuned
RECEIVER, SDRplay RSPduo
SDR PLATFORM, SDRuno
POST PROCESSING, AUDACITY, re-sample to 192,000
SOFTWARE Rx, LrptRx
SOFTWARE DECODER, LRTPoffLineDecoder
All trademarks and software names gratefully acknowledged.